Then the coronavirus outbreak created a sudden need for at-home hoops because of the widespread closure of health clubs, community gyms and public parks on top of the N.B.A.’s mandate that all teams close their facilities. Numerous N.B.A. stars — including Milwaukee’s Giannis Antetokounmpo, Oklahoma City’s Chris Paul, Portland’s C.J. McCollum and, until recently, Boston’s Jayson Tatum — have said that they have gone weeks without shooting during what would normally be playoff time. “Whoever thought times would get like this where you can’t even have access to a basket or a gym?” Butler said. “Nobody thought it would come to this. But it has.”